■
General
4-1-7
APCO P25 Mode Operation
■
General
APCO Project-25 (P25) is designed for public safety
digital radio, and allows you to make a call to a
specific station (Individual call) or to a particular
group (Talkgroup call or Announcement call*) in the
Conventional and Trunking mode. Other P25
transceivers on the channel will not listen in on a call
that does not match their Individual/Talkgroup/
announcement group ID or NAC (Network Access
Code).
Moreover, the following functions and calls are
available:
Pager function
Radio Inhibit
Uninhibit function
Uninhibit function
Radio Monitor function
Radio Check function
Status Message,
Short Message
Status Query,
Phone Call
Emergency Call
Encryption function
■
Control Channel Hunt function
Encryption function.
NAC matching is not necessary for the above
functions and calls.
Each transceiver has a unique ID, and it allows it to
be substituted with an alphanumeric name, if
programmed. You can use this ID (or name) to
select a target station to call, and the ID (or name) of
th t
t t ti i di l
d ft
i i ll
(P25 Trunking mode only)
The P25 Trunking mode allows the transceiver to
automatically hunt for a control channel in a
repeater system, according to the pre-programmed
hunt list* when;
• Turning the power ON.
• The P25 Trunking mode is selected.
The transcei er goes o t of range and does not
the target station is displayed after receiving a call.
*Trunking mode only
▒
✔
IMPORTANT for Trunking mode operation:
▒
• The public Trunking transceiver should be
▒
registered and group affiliated with the control
▒
channel in a current repeater system, to be
▒
operated in the Trunking mode.
• The transceiver goes out of range and does not
receive the downlink signal from the current
registered control channel.
-“OUT OF RANGE” is displayed. (Simple and 10-key
models only)
-S-meter icon is displayed according to the received
signal strength level. (Simple and 10-key models
only)
▒
After the registration and group affiliation are
▒
successful, the Trunking operation can be
▒
performed.
▒
• When the Full Off Air Call SetUp (FOACSU)
▒
function is turned ON, beeps sound after
▒
receiving an Individual call on the Trunking mode,
▒
which is a request for the user’s permission to
▒
accept the call.
-“ ” is NOT indicated.
(Simple and 10-key models only)
37
▒
accept the call.
* The valid control channels (up to 64) are listed on
the hunt list.
